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Motorcycle aluminum alloy surface passivation process

A technology of aluminum alloy surface and motorcycle, which is applied in the field of surface treatment, can solve problems such as environmental pollution, and achieve the effect of white and bright color, low production and use costs

Inactive Publication Date: 2015-02-04
无锡永发电镀有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a passivation process for the aluminum alloy surface of a motorcycle. The passivation solution used in the process replaces hexavalent chromium with trivalent chromium to overcome the environmental pollution caused by hexavalent chromium, and the passivation layer is Has ideal corrosion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A passivation process for aluminum alloy surfaces for motorcycles. The passivation solution used in the process consists of: chromium sulfate 21g / L, zirconium nitrate 6g / L, titanium dioxide 2g / L, 70% sulfuric acid 45ml / L, nickel sulfate 5g / L, ammonium sulfate 5g / L, cerium chloride 0.5g / L, lanthanum nitrate 0.5g / L, water-based acrylic resin 8g / L, trisodium citrate 4g / L, and the balance is deionized water; The chemical process is:

[0017] (1) Remove the oil stains on the aluminum alloy surface for motorcycles, and then wash them with clean water;

[0018] (2) Surface adjustment, activation of the surface layer, washing with water;

[0019] (3) Prepare a passivation solution with the above components, immerse the aluminum alloy for motorcycles in the passivation solution at room temperature, and the passivation time is 6 minutes;

[0020] (4) Wash in hot water at 55°C and dry with hot air.

Embodiment 2

[0022] A passivation process for aluminum alloy surfaces for motorcycles. The passivation solution used in the process consists of: chromium sulfate 23g / L, zirconium nitrate 4g / L, titanium dioxide 4g / L, 70% sulfuric acid 35ml / L, nickel sulfate 7g / L, ammonium sulfate 3g / L, cerium chloride 1.5g / L, lanthanum nitrate 0.3g / L, water-based acrylic resin 10g / L, trisodium citrate 2g / L, and the balance is deionized water; The chemical process is:

[0023] (1) Remove the oil stains on the aluminum alloy surface for motorcycles, and then wash them with clean water;

[0024] (2) Surface adjustment, activation of the surface layer, washing with water;

[0025] (3) Prepare a passivation solution with the above components, immerse the aluminum alloy for motorcycles in the passivation solution at room temperature, and the passivation time is 8 minutes;

[0026] (4) Wash in hot water at 65°C and dry with hot air.

Embodiment 3

[0028] A passivation process for aluminum alloy surfaces for motorcycles. The passivation solution used in the process consists of: chromium sulfate 22g / L, zirconium nitrate 5g / L, titanium dioxide 3g / L, 70% sulfuric acid 40ml / L, nickel sulfate 6g / L, ammonium sulfate 4g / L, cerium chloride 1.0g / L, lanthanum nitrate 0.4g / L, water-based acrylic resin 9g / L, trisodium citrate 3g / L, and the balance is deionized water; The chemical process is:

[0029] (1) Remove the oil stains on the aluminum alloy surface for motorcycles, and then wash them with clean water;

[0030] (2) Surface adjustment, activation of the surface layer, washing with water;

[0031] (3) Prepare a passivation solution with the above components, immerse the aluminum alloy for motorcycles in the passivation solution at room temperature, and the passivation time is 7 minutes;

[0032] (4) Wash in hot water at 60°C and dry with hot air.

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Abstract

The invention discloses a motorcycle aluminum alloy surface passivation process, and the passivation solution used for the process comprises the following components: 21-23g / L of chromium sulfate, 4-6g / L of zirconium nitrate, 2-4g / L of titanium dioxide, 35-45ml / L of 70% sulfuric acid, 5-7g / L of nickel sulfate, 3-5g / L of ammonium sulfate, 0.5-1.5g / L of cerium chloride, 0.3-0.5g / L of lanthanum nitrate, 8-10g / L of water-soluble acrylic resin, 2-4g / L of trisodium citrate and the balance of deionized water; the passivation process is as follows: (1) removing oil stains on motorcycle aluminum alloy surface, and washing with water; (2) adjusting the surface, activating the surface layer, and washing with water; (3) preparing the passivation solution with the above components, dipping the motorcycle aluminum alloy into the passivation solution at room temperature for passivation for 6 to 8 minutes; and (4) washing with water at 55-65 DEG C, and drying with hot air.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a passivation process for the surface of an aluminum alloy used in motorcycles. Background technique [0002] Aluminum alloys are widely used in the motorcycle industry. However, the corrosion resistance of aluminum is weak, and anti-corrosion treatment of its surface is a necessary process. Passivation is one of the most widely used and effective anti-corrosion treatment methods. At present, most domestic enterprises choose the traditional hexavalent chromium passivation process in consideration of technology maturity and cost saving. Although the hexavalent chromium passivation film has good corrosion resistance and beautiful appearance, hexavalent chromium is a highly toxic substance, which is recognized as a carcinogen and a dangerous air pollutant. Hexavalent chromium cannot be degraded in nature, it accumulates in organisms and human body, and can cause long-te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/56
CPCC23C22/56
Inventor 石明
Owner 无锡永发电镀有限公司
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